Manhole.



No. 761,749. v PATENTED JUNE 7, 1904. H. U. BAKER, Jn.

MANHOLE.

APPLIoA'rIoN Hmm 00127, 1903.

No MODEL. n sums-sum1.

1 .4 Tram/frs No. 761,749. PATENTED JUNEV, 1904.`

H. G. BAKER, Jn.

MANHOLB. Brummen FILED 00T. 27. 1ooa. No nonni.. A v 2 nnn'rs-sH-nm a.

Patented J' une 7, 1904.

HUGH C. BAKER, JR.,

oE NEw Yoann. Y.

MANHOLE.

SPECIFICATION forming part of Letters Patent N 0- 761,749, dated June '7, 1904.

Application filed October 27,1903. Serial No. 178,692. (No model.)

To all whom it may concern.-

-manhole for electrical and other conduits of improved construction whereby the said construction is simplified and the cost thereof materially reduced, afurther object being to provide a manhole the cover of which is of improved construction; and with this and other objects in view the invention consists in a manhole constructed as hereinafter described and claimed'.

The invention is fully disclosed in the followingvspecication, of which the accompanying drawings form a part, and in which the separate parts of my invention are designated by suitable reference characters in each of the views, and in which--' Figure l is a central vertical longitudinal sectionof a manhole made according to my invention; Fig. 2, a horizontal section on the line 2 2 of Fig. l; Fig. 3, a plan view of a complete' manhole, part of the cover being removed; Fig. 4, a horizontal section showing a modification; Fig. 5, a View similar to Fig. 4, showing another modiiication; and Fig. 6 a plan view of the manhole shown in Fig. 1, part of the cover being removed and showing a modiiied form of the cover.

In the practice of my invention as shown in the drawings, reference being made to Figs. l to 3, inclusive, I provide a manhole which is substantially elliptical in horizontal section, but the end portions 'of which are straight and parallel and at right angles to the longest diameter of the manhole.

' The manhole which constitutes the subject of this application comprises a bottom a, composed of concrete or any other vsuitable material, a body portion o, and a top portion c. The body portion' I) is composed of separate layers b2 of bricks or blocks composed of concrete material,"and said separate layers consist of bricks or blocks of three different styles or shapes, as shown in Fig. 2, the said different styles or shapes of bricks or blocks being designated in said figure by the reference characters b2, L3, and b4, and when placed in position the bricks or blocks /fform the major part of the ends of the separate layers, while the bricks or blocks b3 from the remaining portions of said ends and a part of the opposite sides, and the bricks or blocks b2 also form a part of the opposite side portions of said layers, the bricks or blocks Z22 and b3 being provided at one end with an abrupt bend, as shown at b, in order to accomplish this result. The bricks or blocks b4, two of which in the form of construction shown in Figs. 1 to 3, inclusive, are employed in the opposite sides of each layer, make up the major portion of the opposite sides of said layers, and in practice the bricks or blocks of the separate layers are so placed that the joints in one layer are overlapped by the bricks or blocks of the layer thereover, as clearly shown in Fig. l, and in order to accomplish this result the position ot' the bricks or blocks Z22 and b3 is reversed in the separate layers. In the form of construction shown in Figs. 1 and 2 the conduits d are passed through the side portions and also through the end portions, and inorder to do this the bricks or blocks L2 and one of the bricks or blocks at each side ofthe manhole are provided with suitable openings d2, and it will be apparent that the arrangement of the conduits maybe varied as desired in any particular case. The size ofthe manhole in horizontal section maybe varied as desired by changing the lengths' or sizes ot the separate bricks or blocks which make up the separate layers of the4 body portion of the manhole, and it will bey observed that the longer part of the bricks or blocks 3 is curved to correspond with the curve in the sides of the manhole, whilethe longer part ot' the bricks or blocksb2 is straight,. so as to produce the desired shape of the en d portions of the manhole, and the shorter portion of the bricks or blocks b3 is also straight to correspond with the longer parts oi' the bricks or blocks b2.

The cover c ot the manhole shown in Figs. 1 and 3, said cover being shown only in Figs.

Ico Y ll and 3, is composed of transverse I-beams a and two different styles of concrete bricks or blocks, one style, two of which are employed, being designated by the reference character f and forming the end portions of the cover, while the other style, two of which are employed, are designated by the reference characters]0g and form the central side portions of the cover, and between the I-beams e is a central opening g, around and over which is placed a collar g2, on which is placed the usual removable cap g3. The opening' g is shown circular in form, but may be of other forms, if desired; but when circular in form the inner edges of the concrete bricks or blocks]2 will be segmental in form, as will be readilyunderstood. The bricks or blocks y and f2, which make up the cover of the 'manhole, are reinforced with metal, as shown at /1/ in Fig. l.

In the form of construction shown in Fig. 4 the separate layers which compose the body portion of the manhole are also composed of three different styles or shapes of bricks or blocks, the end portions of said layers being formed by two similar bricks or blocks and the side portions thereof by two bricks or blocks 112 and fi. The end bricks or blocks are segmental in form and the side bricks or blocks zare slightly curved at one end, as shown at v1", and by reversing the arrangement of the bricks or blocks 2 in the separate layers and also the position ofthe end bricks or blocks v1 the joints of the separate layers will be broken in a manner substantially the same as the construction shown in Figs. I and 2.

In the construction shown in Figs. 5 and 6 the separate layers of bricks or blockswhich constitute the body portion of the manhole are also composed of three different styles or shapes of bricks or blocks, designated in said figures by the 'reference characters), J2, and j, and four of the bricks or blocksjare employed in each layer, four of the bricks or blocks f2, and two of the bricks or blocks j, the bricks or blocks j forming, as shown, a part of the end portions of each layer, while the bricks or blocks y' form the corners of each layer and the bricks or blocks ,7'2 the major part of the side portion of each layer, and by reversing the bricks or blocks j the joints of the separate layers willbe broken in the desired manner. The manhole shown in Figs. 5 and 6 is substantially elliptical in horizontal section and the end portions thereof are slightly curved, and the bricks or blocks j are provided at one end with an abrupt curve, as shown atj, and it will be understood that the sides of the manhole in horizontal section may be varied as desired by changing' the sizes of the separate bricks or blocks which make up the horizontal layers of bricks or blocks which constitute the body portion of the manhole, and in all the forms of construction herein shown and described the bricks or blocks which make up the body portion of the manhole can be molded in three different styles or shapes of molds. I also provide for the man* hole shown in Figs. 5 and 6 a cover, which is shown in Fig. 6 and which comprises a longitudinal T-iron .71,divid ed into separate parts, and two I-beams m, together with the bricks or blocks composed of concrete and two different styles or shapes of which are employed, one style, four of which are employed, beingl designated by the reference character fn and forming the end portions of the cover, while the other style, two of which are employed` are designated by the reference character '11,2 and make up the central side portion of the cover. The bricks or blocks fa and ai are supported by the T-iron 1 and the I-beams va in the usual manner, and central of the cover is formed the usual opening o, around and over which is placed the usual collar di, on which may be placed the usual movable cap, which is not shown.

It will be seen that in all the forms of construction shown and described the manhole is substantially elliptical in form in horizontal section and the body portion thereof is composed of separate layers of bricks or blocks formed of concrete material, and three different styles or shapes of bricks or blocks are employed in each layer and the separate layers being all composed of bricks or blocks of the same style or shape.

The bottom of the manhole may be provided with the usual drain, which forms no part of this invention, and is therefore not shown and described, and in all the forms of construction shown the size of the manhole may be varied by the increasing or decreasing of the size of the separate bricks or blocks of which the separate layers of the body portion of the manhole are composed.

Although I have described the bricks or blocks which make up the body portion and cover of the manhole as composed of concrete material, it will be apparent that the said bricks or blocks may be composed of any material capable of being' molded, cut, or pressed into the required form and possessing the necessary strength.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. A manhole the body portion of which is composed of separate horizontal layers of bricks or blocks, the bricks or blocks in each layer being' of three different styles or shapes and adapted to be reversed in thel separate layers so as to break the joints, substantially as shown and described.

2. A manhole the body portion of which is substantially elliptical in horizontal section and composed of separate layers of bricks or blocks, the bricks or blocks in each layer being of three different styles or shapes, said manhole being also provided with a cover IOO IID

composed of supporting-beams and bricks or blocks reinforced with metal, substantially as shown and described.

3. A manhole the body portion of which is substantially elliptical in horizontal section and composed of separate layers of bricks or blocks, the bricks or blocks in each layer being of three different styles or shapes, said manhole being provided with a cover composed of supporting-beams and bricks or blocks reinforced with metal, said bricks or blocks being of two different styles or shapes, substantially as shown and described.

4. A cover for a manhole composed of parallel transverse bars and bricks or blocks of different shapes or styles, two of said bricks or blocks being of the same shape and placed between said bars and two of said bricks or blocks being of the same shape and each forming one end portion of the cover, substantially as shown and described.

5. A cover for a manhole composed of parallel transverse bars and bricks or blocks of diferent shapes or styles, two of said bricks or blocks being of the same shape and placed between said bars and two of said bricks or blocks being of the same shape and each forming one end portion of the cover, said bricks or blocks being also reinforced with metal, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 23d day of. October, 1903.

HUGH C. BAKER, J R. f Witnesses:

F. A. STEWART, C. J. KLEIN. 

